One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,5)(3,6,7,8)(11,15)(14,16)(18,22)(20,28)(23,29)(24,25)(27,32)(30,31)(10,13)(11,15)(17,18,21,25)(19,23,26,31)(20,24,28,22)(27,30,32,29)(2,5)(6,8)(9,10)(11,14)(12,13)(15,16)(17,19)(18,23)(20,27)(21,26)(22,29)(24,30)(25,31)(28,32) involution — undirected(1,3,4,7)(2,6,5,8)(10,13)(14,16)(18,24)(20,28)(22,25)(23,30)(27,32)(29,31)(9,11,12,15)(10,14,13,16)(19,26)(23,31)(27,32)(29,30)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.